IT service og installasjon

El-Nett AS -

Pb 56 Kalbakken, 0901 Oslo. - Stålfjæra 27, 0975 Oslo - Tlf: 22 91 84 00 - Fax: 22 91 84 20

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1 mile               ≈ 1609 m

1 km/t                   ≈ 0,62 mile/t

1 mile/t                 ≈ 1,609 km/t

1 fot                 ≈ 0,3 m

1 tomme               = 25,4 mm.

1 nautisk mil        = 1852 m

1 knop                  = 1,852 km/t

1 mach                 ≈ 1193 km/t

1 gallon US          ≈ 3,8 liter

1 gallon UK          ≈ 4,5 liter

1 pint UK              ≈ 0,57 liter

1 pint US              ≈ 0,47 liter

1 pund                  ≈ 0,49 kg

1 favn                   = 2 x 2 m x 0,6 m = 2,4 m3

1 kW                     = 1,34 hk

1 hk                       ≈ 0,74 kW

1 °C                       = 33,8 °F.   1 °F = (C x 1,8) + 32

1 °F                       = -17,22 °C. 1°C = (F -32) x 0,5556

Romertall             =  V=5    X=10    XX=20 

                                  L=50  C=100    D=500

Standarder

 

NS-EN 50173              = Standard for felles kablingssystemer

NS-EN 50174              = Standard for installasjonskrav

 

IEEE 802.3                  = Fiber Gigabit Ethernet (GbE)

ISO/IEC 8802-3:1000 BASE

 

Singlemode                =       9/125 µm - 5000 m.

Multimode                  =     50/125 µm -   550 m.

                                    =  62,5/125 µm -   275 m.

 

NS-EN 50173-1 2002

Cat 5e                         = 100 MHz 

Cat 6                           = 200 MHz

Cat 7                           = 600 MHz

 

                                    = 1984 - Erfaring satt i system